Comparison of lattice Coulomb-gauge wave functions in the quenched approximation and with dynamical fermions

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.285· OSTI ID:6899847

Hecht, M W; Bitar, K M; DeGrand, T; Edwards, R; Gottlieb, S; Heller, U M; Kennedy, A D; Kogut, J B; Liu, W; Ogilvie, M C; Renken, R L; Rossi, P; Sinclair, D K; Sugar, R L; Wang, K C ^[1]

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1. National Center for Atmospheric Research; P.O. Box 3000; Boulder; Colorado 80307 (United States) Supercomputer Computations Research Institute; Florida State University; Tallahassee; Florida 32306 (United States) University of Colorado; Boulder; Colorado 80309 (United States) Indiana University; Bloomington; Indiana 47405 (United States) University of Illinois; Urbana; Illinois 61801 (United States) Thinking Machines Corporation; Cambridge; Massachusetts 02139 (United States) Washington University; St. Louis; Missouri 63130 (United States) University of Central Florida; Orlando; Florida 32816 (United States) Argonne National Laboratory; Argonne; Illinois 60439 (United States) University of California; Santa Barbara; California 93106 (United States) University of New South Wales; Kensington;

We present a comparison of Coulomb-gauge wave functions from 6/[ital g][sup 2]=6.0 quenched simulations with two simulations which include the effects of dynamical fermions: simulations with two flavors of dynamical staggered quarks and valence Wilson quarks at 6/[ital g][sup 2]=5.6 and simulations with two flavors of dynamical Wilson quarks and Wilson valence quarks at 6/[ital g][sup 2]=5.3. The spectroscopy of these systems is essentially identical. Parametrizations of the wave functions are presented which can be used as interpolating fields for spectroscopy calculations. The sizes of particles are calculated using these parametrized wave functions. The resulting sizes are small, approximately half the sizes of the physical states. The charge radius of the neutron, which provides an indication of the asymmetries between the wave functions of up and down quarks, is calculated. Although the size of the nucleon in these simulations is small, the ratio of the charge radius of the neutron to that of the proton is consistent with the physical value. We find no significant differences between the quenched and dynamical simulations.

• DOE Contract Number: FG02-85ER40213; AC02-86ER40253; AC02-84ER40125; W-31109-ENG-38
• OSTI ID: 6899847
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:1; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

661100 -- Classical & Quantum Mechanics-- (1992-)
662230* -- Quantum Chromodynamics-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPOSITE MODELS
COULOMB FIELD
ELECTRIC FIELDS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FUNCTIONS
GAUGE INVARIANCE
INVARIANCE PRINCIPLES
LATTICE FIELD THEORY
MATHEMATICAL MODELS
MECHANICS
PARTICLE MODELS
POSTULATED PARTICLES
PROPAGATOR
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUANTUM MECHANICS
QUARK MODEL
QUARKS
SIMULATION
SPECTROSCOPY
WAVE FUNCTIONS